Saw-set.



Patented Feb. 4,1902.` .1. s. BAKER.

SAW SET.

(Application lad May 8, 1901.)

(No Muriel.)

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Unire STnTne PATIENT Critica;

JOSEPH G. BAKER, OF PHILADELPHIA, PENNSYLVANIA. i

SAW-

S ET.

SECIFGATION farming' part 0f Letters Patent N0. 692,226, dated February4, 1902.

` Application filed May 8| 1901. Serial No. 59.199. (No model.l

To all whom t may concern.-

Be itknown that I, JOSEPH G. BAKER, a citizen of the United States,residing at Philadelphia, county of Philadelphia, and State ofPennsylvania, have invented a certain new and usefullmprovement inSaw-Sets,of which the following is a specication.

My invention relates to a new and useful improvement in saw-sets, andhas for its object to provide a tool of this description which will settwo adjacent teeth of the saw at opposite directions to one another atthe saine operation.

A further object of my invention is to provide adjustments whereby theoperation of setting a saw will be facilitated.

. Another object is that by constructing a tool of a few parts the sainecan be manufactured at a comparatively small cost and yet is durable andeffective.

With these ends in view this invent-ion consists in the details ofconstruction and combination of elements hereinafter setforth and thenspecifically designated by the claims.

In order that those skilled in the art to which this. inventionappertains may understand how to make and use the same, the constructionand operation will now be described in detail, referring to theaccompanying drawings, forming a part of this specification, in which`Figure l isa side elevation of my device in its normal position; Fig. 2,a front elevation of the same; Fig. 3, alongitudinal section of Fig. l;Fig. 4, a section on the line 4 4 of Fig. l; Fig. 5, a detail view ofthe two dies, showing that portion of the dies which bends one of theteeth in one direction; Fig. 6, a detail viewof the dies, showing thatportion adapted to bend the other tooth in the other direction; and Fig.7 is a modification showing the crosssection of a stationary die and theupper part of the body, showing said die made adjustable instead of the'pivoted die.

j In carrying out my invention as here embodied,A represents the body ofthe tool,which has the iianges B turned up upon each side, so that theupper part of the tool, is channeled. The lower part of the body extendsdownward and is formed into a handle C.

To the inner face of the body A is secured a stationary die D, which dieis secured to the body A by means of rivets or in any other suitablemanner.

E is a lever which is pivoted between the anges B at the point F. Thislever E carries upon its upper end the die G.

H is a lever which is pivoted or fulcrumed between the flanges B at thepoint I. The upper end of this lever has a notch J formed in it, inwhich the lower end of the lever E projects. 'lhus when the lever II iscompressed toward the handle C the lever E is caused to rock upon thepivot F, which will force the die G toward the stationary die D. Aspring K is interposed between the handle C and the lever H for thepurpose of causing the levers H and E to resume their normal position.The die D has formed upon its face the two beveled surfaces l and 2.

The saw is placed between thedies in such a position that the base ofthe teeth will be on a line with the junction of the beveled surfaces 1and 2 and the liatsurface 3 of the die D, and when the die G is forcedtoward the die D this die G will strike the saw at or near the base ofthe teeth. Thusthe tooth which lies upon the beveled surface l will beset outward. 'lhe die G has a small projection 4 extending out from theface, and this projection is arranged in such a position upon the die Gthat when said die is forced toward the die D it will strike the toothof the saw at a point between the base and the point of the tooth, andas the beveled surface 2 is beveled inward it will force the tooth in anopposite direction to that tooth which lies upon the beveled surface l.Thus two teeth of the saw will be operated upon at the same time and setin opposite directions.

For the purpose of assuring that the die G will always strike the teethat the base ofthe same I provide guides L, upon which the points of theteeth rest While being operated upon. As teeth in different saws are ofdifferent lengths,this guide L, I make adjustable in the followingmanner: A portion L of the guide L is bent at right angles and has aslot formed through it, through which protrudes the set-screw M, whichis threaded in the back` of the body A. Thus the guide L can be adjustedvertically to a certain limit each way. The guides L straddle the upperportion of the body A and the die D and are ar- IOO ranged upon eachside there-of. As there are more or less number of teeth to the inch indifferent saws of different sizes, one of the dies will necessarily haveto be made adjustable.

In Figs. l, 2, 3, and 4 I show the die G adjusted laterally to the die Dby threading the pivot F through one of the flanges B and providing athread F upon the end of the same for the purpose of turning it. Betweenthe Opposite flanges B and the lever E, I interpose a spring O. Thus thescrew-threaded flange B will force the lever E, and consequently the dieG, in one direction, and as the screw is turned in the opposite'direction the spring O will force the lever E backward. This adjustmentis necessary, because one of the teeth should always lie upon thebeveled surface 1 of the die D, and the other tooth should lie so thatthe projection 4 of the die D will strike the same. In Fig. 7 I haveshown this adjustment applied to the die D by forming a block D' uponthe back of the die D, and this block fits within a slot P, formedthrough the upper end of the body A. A set-screw Q is threaded into thedie D, and its shoulder bears against the body A, thereby setting it inwhatever position itis placed. In operation the saw isplaced between thedies, and the guides L are set so that when the points of the teeth restupon these guides the bases of the teeth will be in such a position thatthe die kG will strike at the base. Then the jaws are adjustedlaterally, so that one of the teeth will rest upon the beveled surface 1of the die D and its next adjacent tooth will rest upon the surface 2 ofthe die D, so that when the die G is forced toward the same theprojection 4 will strike this second tooth. Then by compressing thelever H toward the handle C these two teeth are set in oppositedirections to one another at the same time. Then by simply moving thesaw somewhat two more unset teeth are presented tothe dies. These teethcan be set, and so on until all of the teethvof the saw are set.

/The advantages of-my invention are that bysetting two teeth of the sawin opposite direct-ions at one operation the time required tofset a sawis reduced one-half, and another advantage is that by constructing thetool as I do it consists of comparatively few parts, which cheapens thecost of manufacture and renders the tool less liable to become out oforder, while at the same time making the tool very durable and'eiicientin operation.

Of course I do not Wish to be limited to the exact construction hereshown, as slight modiiications could be made without departing from thespirit of my invention.

Having thus fully described my invention, what I claim as new and usefulis 1. The combination in a device of the character described, a bodyhaving flanged sides, a die carried thereby, a lever pivoted to theflanges of a body, an operating-lever 'pivoted to the body and engagingthe first-named lever, two oppositely-beveled surfaces on one of thedies, projections formed upon the second die, the said dies being soformed as to bend two adjoining teeth in opposite directions,substantially as described.

2. The combination in a device of the charaoter described, two dies, oneof said dies adapted to be secured rigidly to the body, the other dieadapted to be pivoted in the body so as to be caused to rock toward andaway from the stationaryy die, two beveled surfaces formed upon one ofthe dies, said surfaces be- 'ing beveled in opposite directions to oneanother, a flat surface formed upon the face of each die against whichthe blade of the saw is adapted to rest, an edge formed upon the otherdie, which edge is adapted to come in contact with the saw at a pointopposite the junction of the beveled surfaces, for the purpose ofsetting one of the teeth in one direction, a projection formed upon thesecond die, which projection is adapted to come in contact with thesaw-tooth at a point between the base and the point of said tooth so asto bend the other tooth in the opposite direction, substantially asdescribed and for the purpose specified.

' In testimony whereof I have hereunto affixed my signature in thepresence of two subscribin g witnesses.

JOSEPH G. BAKER.

Witnesses:

H. B. HALLooK, L. W. MORRISON.

